Improvement in sewing-machine shuttles



No. 196,018. Patented Oct. 9, 1877.

NITED STATES FFIGEO IMPBOVEMENT IN SEWlNG-MACHINE SHUTTLES.

Specifieation forming part of Letters Patent N0. 196,018, dnted October9, 1877; application filed Jn1y 13, 1877.

T0 all whom it may concern:

Be it known that I, Tnos. J. HOLTON, of Phiia.delphia, in the county ofPhiladelphia and State of Pennsyivania, hawe invented eertain new andusefnl Improvements in Sewing- Machine Shuttles; and I do hereby declarethe follo'wing to be a full, clear, and exact descripti0n of theinvention, such as Wil1 enab1e others ski1led in the art t0 which itpertains to make and use it, reference being had to the accompanyingdrawings, Which form part of this speeification, in which- Fignres 1, 2,and 7 are perspective details. Fgs. 3 and 4 areperspectves of myinvention, showing, respectively, t11e sections of the shuttle part1yand wholly closed; Figs. 5 and 6, transverse vertieal sections.

My invention has fox its object to provide a, shuttle whieh aan hethreaded With -litt1e 01 no diffieulty, and the tenson of which may beadjusted without the manpulation of serews, disks, or other devicesreqniring the use of a tool t0 effect their movement.

My improvements eonsist in forming a sewing-maehine shuttle of twocylnders whieh telescope together, one sliding into the other, and thethread from the bobbin within passing between them to ob tain therequired tension.

My improvements stil1 further eonsist in the peeuliar details ofconstruetion hereinafter fu1ly set '0rth.

Referring to the accompanying drawing, A and Brepresent two cylinders,having eaeh a closed and an open end, the closed end of the cylinder Abeng 01 terminating in a. point, while the closed end of the eylinder Bis a b1nnt 01 rounded head, b. Eaeh of the eylinders has a center hole,(shown at a and 7), respectively,) forming bearings for the bobbin C,which is of the eommon 01 any suitable construction. The open end of theeylinder B is perfectly annu- 12n, so that its W&11 is of the same depth0r length all around, while the open end of the cy]inder A is beve1ed,s0 as to eause one side, a", of said cy1inder to be 10nger than theopposite side a The eylinder A has & longtudinal slot, a, leading intowhich is a transverse notch 01 thread-groove, c. Said eylinder is alsopro- "ided 01 formed with a pin 01 stud, d, whch extends inwnrdiy, asshown.

'lhe eylinder B bus 21 longtndinal cnrved slot, 0, the n1eta1 of thecylinder on one side of the same being diminished in thickness, s0 as toform a shonlder, e. An annular groove, f, in the cylinder B, aflords apassage OI the stud d.

G is a spring-tongne in the eylinder B, formed by sawing 01 euttingthrongh the metal of the 1atter, as sh0wn at h z k. groove 01thread-ehannel, beginning at the shoulder 0, and extending, as shown,into the tongne G.

The method of threading the shuttle is substantially as follows: Thebobbin is placed in the eylinder B and the 1atter slid into the cy1-inder A, the shonlder e being in line with the slot a, and the free endof the bobbinthread beng passed 01 passing 0ut throngh the slot 6. VVhenthe open end of the eylinder B 1neets the closed end 0' the cylinder A,the pin 01 stud d will be in line transversely With the groox*e f, whehit will enter 0n rotatng the two eylinders in opposite direetions ontheir longtndinal axes, the cylinder B to the Ight and the eylinder A tothe left, the b0bbin thread having been irstdrawn to enter thethread-gnide 01 noteh 0.

The adj nstinent of the tension is ac eomplished by continning therotation of the cylinders in the direetion already snggested, the extent0 rotati0n reqnired being indicated by a gage, (shown at L.)

VVhat I elain1 as 1ny invention is 1. A sewing-nmehine shuttle eomposedof two eylinders, whieh telescope 01 s1ide one into the other, and arearranged, as described, t0 pe11nit the nner eylinder to be re"olvedwithin the enter t0 adjnst the tension of the bobbinthread,substantially as set forth.

2. The eylinder A, having a pointed closed end, a, 211 beveled 01inelined open end, & longitndinal slot, (0, thread-gude 0, and pin 01stnd d, substantially as sh0wn and described.

3. The eylinder B, havng slet e, shoulder e, and annnlar grooves f g,substantially as shown and described.

4. The shuttle-cylinder B, having springg is a short annular Intestimony that I claim tl1e foregong I have hereunt0 set my hand this11th day of July, 1877.

THOS. J. HOLTON.

\Vitnessesz SAML. J. VAN STAVOREN, J NO. A. BELL.

